d The number of unlinked passenger trips is equivalent to the number
of passengers who board public transit vehicles. Passengers are counted each
time they board a vehicle regardless of how many vehicles are necessary for
a passenger to get to their destination.

e Rates are based on total incidents including accidents and were
calculated by dividing the number of fatalities, injuries, and incidents in
this table by the number of unlinked passenger trips.

NOTES

Data are provided only for transit systems that furnished safety data for inclusion
in the U.S. Department of Transportation, Federal Transit Administration Transit
Safety and Security Statistics and Analysis annual reports. Data covers
only direct-operated urban transit systems. Vehicle-miles for all transit systems
including nonurban and purchased can be found in the vehicle-miles table in
chapter 1.